/Engine/Source/Runtime/Engine/Classes/GameFramework/PlayerController.h
Returns the PlayerState associated with the player at the specified index.
the PlayerState associated with the player at the specified index, or None if the player is not a split-screen player or the index was out of range.
[APlayerState](API\Runtime\Engine\GameFramework\APlayerState) * GetSplitscreenPlayerByIndex ( int32 PlayerIndex ) const